direct current electric resistance welding (DC-ERW)

A welding process where metal components are joined using electric resistance heat generated by passing direct current (DC)An electric current that only flows in one direction. Its direction and power do not change. DC is typically used in household electronics and battery-powered d… through the components, melting the metal at the jointA single section (also pipe spool) of pipe that is circumferentially welded to form a pipeline.. It is widely used in the manufacture of steel piping.